Concrete mixer



May 8, 1923. I 1,454,370

G. N. ADAMS CONORE'IE MIXER Filed July 6. 1922 2 Sheets-Sheet l G. w. ADAMS CONCRETE MIXER May 8,

2 Sheets-Sheet 2 Filed July 6, 1922 WITNESSES 2,]

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Patented May 8, 1923.

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CONCRETE MIXER.

Application filed July 6, 1922. Serial No. 573,082.

To all whom it may concern:

Be it known that I, GEORGE WASHINGTON ADAMS, a citizen of the United States, and a resident of San Antonio, in the county of Bexar and State of Texas, have invented certain new and useful Improvements in Concrete Mixers, of which the following is a specification.

y invention relates to improvements in concrete mixers of that type utilizing drums or receptacles adapted to be operated by hand to have an oscillatory or semi-rotative movement, and it consists in the combinations, constructions and arrangements herein described and claimed. I

An object of my invention is to provide a concrete mixer of the character described which includes a receptacle of novel form and which is provided with novel mixing elements disposed therein and so located in the receptacle as to insure the thorough and effective mixing of concrete ingredients to provide a concrete of ordinary consistency when the receptacle is operated.

A further object of my invention. is to provide a device of the character described which is readily portable and which can be conveniently positioned between or over forms for receiving the mixed concrete so that the latter can be discharged directly into the forms without precluding the charging of the receptacle from wheelbarrows or the like.

A further object of my invention is to provide a mixer of the character described.

which is light in weight, strong and durable in construction and which is thoroughly practical commercially.

Other objects and advantages will be apparent from the following description, and the novel features of the invention will be particularly outlined in the appended claims.

My invention is illustrated in the accompanying drawings, forming a part of this application, in which: 7

'Fig. 1 is a side elevation of a concrete mixer e bo ying my inv n io Fig. 2 is a perspective view, looking at the front side of the mixer,

Fig. 3 is a vertical longitudinal central section through the mixer, and

Fig. i is a transverse vertical central section thr ugh the mix r.

In carrying out my invention, 1 provide areceptacle 1 which comprises a substantially pear-shaped body consisting of a bottom 2, parallel sides 373, and ends land 5 respectively. The sides, ends and bottom of the receptacle body may be secured to one another in any suitable manner or. may be formed integrally with one another. The ends 4: and 5 are curved and divergent from the bottom 2 for approximately one-third their length. The remaining portions of the ends 4 and 5 are substantially straight and converge toward their upper ends so that the mouth or upper open end Got the receptacle has an area less than that of any other portion of the receptacle lying'in a plane parallel With the edge of the mouth 6. The area of the receptacle is greater along a plane intersecting the junctures of the curved lower portions of the'ends 4; and 5 with the relatively straight upper portion of the ends than at any other place; e en s o med t project in o h neck portion of the receptacle adjacent to the mouth 6, as indicated at 7, fora purpose which will be hereinafter set forth and the sides and ends of the receptacle body are formed to provide an outwardly extending continuous flange or lip 8.

The receptacle 1 is supported upon a frame 9 by means of a pair of axially alined trunnions 9.9 which are fixed at their inner ends in attaching plates 10-10 secured to the inner walls of the sides 83. The trunnions 99 extend through the sides 3+3 and are supported adjacent to their outer ends, preferably antifrietionally, in bearing portions 11711 of a pair of upright members l2-12 whic r inc d, in the frame The frame 9 comprises a pair of substantially r zonta long tu nal m mbers l wh h a e shown s eing of c n or U-shaped formation and which are conneo e and braced at thei on e d y a cross member 1st, also of channel or U- shape in cross section, intermediately by a cross membe 'Whi h .is show as being of angle iron, The upright frame members 1;2 -12 are secured adjacent to their lower ends to the longitudinal members 13- 3 d re o co nected othe latter by inclined braces 16. The trance 9 s, mov bly supported dj c nt to. as rea w rd end. upon a pair of Wh l l7=-:'17

mounted in axles 18-18 depending from the longitudinal side members 13-13 of the frame. The longitudinal side members 1313 of the frame are normally maintained substantially in horizontal position, as stated, supporting members 1919 being secured to the side members 1313 and the transverse member 1 1 to support the frame in relatively elevated position at the front end thereof. The supports or skids 19-49 engage a surface upon which the frame is positioned to prevent accidental movement or displacement of the frame from the position to which it has been moved.

Platform members 2020 extending longitudinally of the frame at opposite sides thereof are swingingly attached to the longitudinal side members 1313 by means of strap hinges 21 and are held against swinging movement downwardly below a horizontal plane by flexible connecting members, such as the chain 22 which extends between the outer edges of the platform members 20 and the upright members 1212, being so arranged as to be taut when the platform members are in horizontal planes.

Apertures 23 in the platform members 20, are adapted to serve as hand-holds when it is desired to move the device as a unit. The receptacle 1 is illustrated in Figs. 1 and 2 and in Fig. 3 is indicated by the full lines in position to be charged. At this time, the neck portion of the receptacle rests upon a pair of spaced upright bumper members 25 which are upstanding from the cross or frame member 14 and which are stayed by brace members 26 extending therefrom to the inclined brace members 16. The receptacle 1 is provided with a pair of handles 27 extending from the upper end thereof and adapted to be grasped to rotate the receptacle from the position indicated by the full lines in Fig. 3 to the intermediate position indicated by the dotted lines in Fig. 3 and through the intermediate position to discharging or up-tilted position as indicated also by dotted lines in Fig. 3. To the end that the charge within the receptacle may be agitated and the ingredients thereof thoroughly mixed when the receptacle is rotated, I provide mixing blades 28, 29 and 30 respectively. The mixing blades are of different sizes and include side portions attached to and spaced from each of the ends of the receptacle by means of brackets 31 and intermediate curved or substantially annular portions sloping inwardly and downwardly within the receptacle, as shown. The mixing blades 28 and 29 are secured to the inner face of the ends 41 adjacent to and at opposite sides of the longitudinal median line thereof, the blade 28 being nearer to the upper end of the receptacle than the blade 29 and being the smallest of the three blades. The blade 30 is the largest of the three blades and is secured to the inner face of the end 5 approximately midway of the length of the latter. In addition, the ingre dients within the receptacle are mixed through the action of gratings 31 and 32 which extend in spaced substantially parallel relation between the sides 3-3 of the receptacle, the lower ends of the, gratings terminating adjacent to but short of the bottom 2, while the upper ends of the gratings terminate approximately midway between the bottom and the upper end of the receptacle. As best seen in Figs. 3 and 4, the gratings comprise pairs of spaced transverse bars having their ends secured to the sides 33 and being designated in the drawings as 31, 31 and 32 32 for the respective gratings. The transverse bars 31 31 support a series of spaced parallel substantially straight rods 81 which are secured adjacent to their upper ends to the cross bar 81 and have the intermediate portions thereof extending through apertures in the cross bar 31, the lower ends of the bars extending nearly to the bottom 2, as stated. The cross bars 32 and 32 likewise support a series of parallel rods 32 which rods differ from the rods 31 in that they are bent or curved laterally adjacent to their lower ends, adjacent rods being reversely curved, as shown.

A pouring spout 33 is attached to the inner face of the end 5 at the mouth of the receptacle and is provided with an outlet 34: of relatively small area. The pouring spout permits of the discharging of concrete fronr the receptacle into relatively narrow forms. A member 35 upon the frame 9 is adapted to engage the receptacle 1 when the forward end of the frame is elevated to hold the receptacle in such position that the weight thereof is imposed upon the frame directly over the wheels, whereby the device is readily portable.

Hand-hold 36 on cross member 14 is used to raise the front portion of the frame and aid in moving the machine forward or backward on the wheels 17.

From the foregoing description of the various parts of the device, the operation thereof may be readily understood. The concrete ingredients are charged or loaded directly from any suitable source, such as wlieelbarrows, into the receptacle through the mouth 6. The handles 27 are then grasped and the receptacle is oscillated slowly back and forth between the full line position in Fig. 3 and to a horizontal position on reverse side, making an oscillation through approximately also aiding mixing action by tapping drumlightly on bumping posts 25. This movement of the receptacle occasions a tumbling or oscillatory movement of the charge within the receptacle and the ingredients thereof are thoroughly mixed by reason of the action of the mixing blades and gratings aided by the operating movements of the receptacle, whereby a concrete of ordinary consistency will be quickly produced with but relatively little muscular effort. When the concrete has been produced in the manner described, the receptacle is rotated tothe position indicated in Fig. 3 by the dotted lines remote from the full line position and the contents of the receptacle will be discharged through the mouth 6 or the pouring spout 33 to a desired place, as for instance, to a form (not shown) positioned below the frame. It is to be observed at this point that the rest or bumper members 25 engage in the indented or inwardly extending portion of the end 4 when the receptacle is in the position indicated by the full lines in Fig. 3 and prevent further rotation of the receptacle about its axis toward the front end of the frame. In consequence, since the end 4: is formed to extend inwardly adjacent to the mouth of the receptacle, a relatively great charge can be accommodated within the receptacle without being spilled from the mouth thereof during the operating or mixing movement of the receptacle.

Obviously, my invention is susceptible of embodiment in forms other than that in which illustrated in the accompanying drawings, and I therefore consider as my own, all modifications and adaptations there of as fairly fall within the spirit and scope of the appended claims.

I claim 1. In a device of the character described, a receptacle mounted for oscillation about a fixed axis and being open at normally upper end thereof, and a mixing blade extending within the receptacle from an inner wall thereof and being inclined downwardly and inwardly in respect to the opening of the receptacle.

2. In a device of the character described, a receptacle decreasing in area toward an open end thereof, mixing blades extending within the receptacle from opposite walls thereof, and mixing grates supported within the receptacle to extend between opposite mixing blades.

3. In a device of the character described, a receptacle decreasing in area toward an open end thereof, mixing blades extending within the receptacle from opposite walls thereof, and a plurality of spaced mixing gratings supported within the receptacle to extend between opposite mixing blades, said gratings including bar-like members extending transversely of the receptacle and rod-like members extending longitudinally of the receptacle and terminating adjacent to but short of the closed end thereof.

4. In a device of the character described,

a receptacle decreasing in area toward an open end thereof, mixing blades extending within the receptacle from opposite walls thereof, and a plurality of spaced mixing gratings supported within the receptacle to extend between opposite mixing blades, said gratings including rod-like members extending transversely of the receptacle and other rod-like members extending longitudinally of the receptacle and terminating adjacent to but short-of the closed end thereof, the longitudinal rod-like members of one of the gratings being curved laterally adjacent to the closed end of the receptacle, the curved portion of adjacent rod-like members extending in staggered relation in respect to one another.

5. In a device of the character described, a receptacle comprising a hollow body having an opening at one end thereof, said body being enlarged to be greatest in area at a plane extending transversely therethrough approximately one-third of the distance from the closed end to the open end thereof and to decrease in area toward both the closed end and the open end thereof, the area of the open end being considerably less than that of the opposite or closed end, said body having the walls of one side thereof formed to extend inwardly adjacent to the open end of the receptacle.

6. In a device of the character described, a receptacle comprising a hollow body having an opening at one end thereof, said body having the walls at one side thereof formed to extend inwardly adjacent to the open end of the receptacle, a frame supporting the receptacle for oscillation about an axis extending through the receptacle, and a substantially vertical bumper upon said frame and terminating at its upper end substantially in the horizontal plane of the axis about which the receptacle body may oscillate and in position to engage said inwardly extending portion ofthe receptacle body to limit the rotation of the receptacle about its axis in one direction and toprovide a rest for the open end portion of the body.

7. In a device of the character described, a receptacle having an open upper end and closed bottom into which concrete ingredients may be charged, and a plurality of mixing blades extending within the receptacle from the inner wall thereof, each of said mixing blades including spaced attaching sides and intermediate portions of sub stantially arcuate cross sectional contour, said intermediate portions being tangent to planes extending obliquely to the plane of the open end of the receptacle and sloping longitudinally from the ends thereof proximate to the inner wall of the receptacle toward their free ends.

8. In a device of the character described,

a receptacle consisting of a hollow body located nearer to the closed end than to the provided with an opening at one end thereof open end of the receptacle, and having the and being closed at its opposite end, said wall of the opposite side thereof formed to 10 body having the Wall of one side thereof provide a re-entr'ant portion adjacent to convexly curved and extending from a point the open end of the body.

adjacent to the open end of the receptacle longitudinally of the receptacle to a point GEORGE WASHINGTON ADAMS. 

